Honeywell RTH5100B User manual

RTH5100B
Non-Programmable Digital Thermostat
Quick Installation Guide
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Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling system
– It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring assistance before
returning the thermostat to the store.

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1Turn Off Power to Heating/Cooling System
M28097

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Remove old thermostat but leave wallplate with wires attached.
2Remove Old Thermostat
M28099
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Leave wallplate
in place
Old thermostat
Cover

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Label the wires using the supplied wire labels as you disconnect them.
3Label Wires with Tags
Wire Labels
M28100
M28093

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M29532
4Separate Wallplate from New Thermostat
Wallplate
Pull here to remove wallplate from new thermostat.
Remove battery holder.

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Mount the new wallplate using the included screws and anchors.
5Mount Wallplate
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
MCR29533

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MCR29534
Simply match wire labels.
6Connect Wires
Labels don’t match? See page 21.
Have a Heat Pump system? See page 13.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
Remove metal jumper if
you have both Rand Rc
wires.

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MCR29535
Install two AAA alkaline batteries.
Back of thermostat
7Install Batteries

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Install thermostat onto the
wallplate on the wall.
8Install Thermostat onto Wallplate
MCR29536